1 John 4:1
Beloved, do not believe every spirit, but test the spirits to see whether they are from God. For many false prophets have gone out into the world.

2 Peter 2:1
Now there were also false prophets among the people, just as there will be false teachers among you. They will secretly introduce destructive heresies, even denying the Master who bought them—bringing swift destruction on themselves.

Jeremiah 14:14
“The prophets are prophesying lies in My name,” replied the LORD. “I did not send them or appoint them or speak to them. They are prophesying to you a false vision, a worthless divination, the futility and delusion of their own minds.

2 Corinthians 11:13-15
For such men are false apostles, deceitful workers, masquerading as apostles of Christ. / And no wonder, for Satan himself masquerades as an angel of light. / It is not surprising, then, if his servants masquerade as servants of righteousness. Their end will correspond to their actions.

Deuteronomy 13:1-3
If a prophet or dreamer of dreams arises among you and proclaims a sign or wonder to you, / and if the sign or wonder he has spoken to you comes about, but he says, “Let us follow other gods (which you have not known) and let us worship them,” / you must not listen to the words of that prophet or dreamer. For the LORD your God is testing you to find out whether you love Him with all your heart and with all your soul.

1 Timothy 4:1
Now the Spirit expressly states that in later times some will abandon the faith to follow deceitful spirits and the teachings of demons,

Ezekiel 13:9
My hand will be against the prophets who see false visions and speak lying divinations. They will not belong to the council of My people or be recorded in the register of the house of Israel, nor will they enter the land of Israel. Then you will know that I am the Lord GOD.

Acts 20:29-30
I know that after my departure, savage wolves will come in among you and will not spare the flock. / Even from your own number, men will rise up and distort the truth to draw away disciples after them.

Micah 3:5
This is what the LORD says: “As for the prophets who lead My people astray, who proclaim peace while they chew with their teeth, but declare war against one who puts nothing in their mouths:

2 Thessalonians 2:9-12
The coming of the lawless one will be accompanied by the working of Satan, with every kind of power, sign, and false wonder, / and with every wicked deception directed against those who are perishing, because they refused the love of the truth that would have saved them. / For this reason God will send them a powerful delusion so that they believe the lie, ...

Jeremiah 23:16
This is what the LORD of Hosts says: “Do not listen to the words of the prophets who prophesy to you. They are filling you with false hopes. They speak visions from their own minds, not from the mouth of the LORD.

Revelation 19:20
But the beast was captured along with the false prophet, who on its behalf had performed signs deceiving those who had the mark of the beast and worshiped its image. Both the beast and the false prophet were thrown alive into the fiery lake of burning sulfur.

Zechariah 13:2-3
And on that day, declares the LORD of Hosts, I will erase the names of the idols from the land, and they will no longer be remembered. I will also remove the prophets and the spirit of impurity from the land. / And if anyone still prophesies, his father and mother who bore him will say to him, ‘You shall not remain alive, because you have spoken falsely in the name of the LORD.’ When he prophesies, his father and mother who bore him will pierce him through.

2 Timothy 3:13
while evil men and imposters go from bad to worse, deceiving and being deceived.

Isaiah 9:15-16
The head is the elder and honorable man, and the tail is the prophet who teaches lies. / For those who guide this people mislead them, and those they mislead are swallowed up.